Query 1731-1733 ages 8-15 I get six hits.

group by crime I get:
1731 1 Robbery and 1 Stealing overlayed (incorrect)
1732 2 Robbery stacked (correct)
1733 1 Currency and 1 Robbery overlayed (incorrect)

group by gender I get
1731 2 male stacked (correct)
1732 2 male stacked (correct)
1733 1 male and 1 female stacked (correct)

group by outcome I get (THIS IS A PARTICULARLY WEIRD CASE)
1731 1 executed and 1 transport stacked (correct)
1732 2 executed stacked (correct)
1733 1 executed and 1 transport overlayed (incorrect)

group by respite I get (THIS IS A PARTICULARLY WEIRD CASE)
1731 1 toDie and 1 specified overlayed (incorrect)
1732 2 toDie stacked (correct)
1733 1 toDie and 1 specified stacked (correct)

group by respite I get (THIS IS A PARTICULARLY WEIRD CASE)
1731 1 1-14 and 1 15-19 overlayed (incorrect)
1732 2 15-19 stacked (correct)
1733 2 15-19 stacked (correct)

in the query, the for the initial query is crime_group_text, year, and the other queries appear to be grouping-by correctly. I don't get why sometimes there is overlay and sometimes stacking of 2 series (e.g. the two incorrect results for sort by crime), and I really don't get why there is sometimes overly and sometimes stacking for the same combination of series (e.g. sorting by outcome, executed and transport in 1731 and 1733).